search engine designed for kids.
Google is probably the most common search engine you might use with a student or even on your own. There are several ways to refine your searches when you use google. By going into advanced searches, you can customize your searches, and you can even have them displayed by reading level (determined by # of words, not Lexile) Here's a video on how to make google searches more effective.
Yippy is a search engine that can simplify searches. Instead of a long list of sites listed, it shows "clouds" of sites that are organized into categories to narrow the search.
Ask Kids: Similar to Ask Jeeves, but it is geared towards kids.
KidRex: Kid friendly search engine from Google.
Quintura for Kids: Kid friendly search engine.
Cyber Sleuth Kids: Search engine and homework helper site for kids.
Kids Click: Search engine for kids, and it gives reading levels for pages found.
There are many other commonly used search engines. One way to understand where the Search Engine is pulling from, you can look at this Chart to see how they work.